• Allow free flow in one direction only • Simple reliable design • Low weight • Low cracking pressure • High operating pressure Medium: Compressed Air, Filtered, Lubricated and Non-Lubricated, Vacuum Body: Anodised Aluminium Collet: Nickel Plated Brass Spring: Stainless Steel Seals: Nitrile Rubber Valve & Insert: Aluminium Mounting: Line Mounted, Push-In Connection Tubing Types: Nylon 11 or 12. Polyurethane, and other plasticised or unplasticised tubing which conforms to the tolerances specified in BS 5409, part 1, 1976, light and normal duty, DIN 73378, DIN 74234, NFE 49100